package com.blackcat.annotation.async.config;

import com.blackcat.annotation.async.bean.AsyncBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskExecutor;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ThreadPoolExecutor;

/**
 * <p> 描述 : 线程池
 * @author : blackcat
 * @date  : 2020/8/3 14:02
*/
@Configuration
@EnableAsync
public class ThreadPoolConfig {

	private static int corePoolSize=30;

	private static int maxPoolSize=100;

	private static int queueCapacity=100;

	private static int keepAliveSeconds=300;

	@Bean
	public TaskExecutor jobExecutor() {
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		// 设置核心线程数
		executor.setCorePoolSize(corePoolSize);
		// 设置最大线程数
		executor.setMaxPoolSize(maxPoolSize);
		// 设置队列容量
		executor.setQueueCapacity(queueCapacity);
		// 设置线程活跃时间（秒）
		executor.setKeepAliveSeconds(keepAliveSeconds);
		// 设置默认线程名称
		executor.setThreadNamePrefix("async-job-thread-");
		// 设置拒绝策略rejection-policy：当pool已经达到max size的时候，如何处理新任务 CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
		// 等待所有任务结束后再关闭线程池
		executor.setWaitForTasksToCompleteOnShutdown(true);
		return executor;
	}

	@Bean
	public AsyncBean asyncBean(){
		return new AsyncBean();
	}

}
